Inhibition of leukocyte rolling in venules by protamine and sulfated polysaccharides
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چکیده
منابع مشابه
Inhibition of leukocyte rolling in venules by protamine and sulfated polysaccharides.
Intravital video microscopy was used to investigate leukocyte margination in 80 mesenteric venules (19 to 54 microns) of 50 anesthetized rabbits. After intravenous (IV) bolus injection, sulfated polysaccharides reduced in a reversible and dose-dependent way the number of leukocytes rolling slowly along the venular wall. The presence of sulfate groups is essential because other negatively charge...
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At the onset of the inflammatory process, leukocytes roll along venular but not arteriolar walls before they firmly attach and emigrate. To test whether differences in hydrodynamic flow conditions are responsible for the preferential occurrence of leukocyte rolling in venules, we varied wall shear rate, 'Yw, between 30 and 2,000 sec` by selective micro-occlusion of side branches in venules and ...
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A role for the alpha 4-integrin (alpha 4 beta 1 or alpha 4 beta 7), has been implicated in the recruitment of peripheral blood mononuclear cells (PBMCs) to sites of inflammation. However, the adhesive interactions (i.e., tethering, rolling, and adhesion) mediated by the alpha 4-integrin have not been characterized in vivo. The objective of this study was to establish a model wherein postcapilla...
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Leukocyte capture and rolling are mediated by selectins expressed on leukocytes (L-selectin) and the vascular endothelium (P- and E-selectin). To investigate the role of core 2 beta1-6-N-glucosaminyltransferase (C2GlcNAcT-I) for synthesis of functional selectin ligands in vivo, leukocyte rolling flux and velocity were studied in venules of untreated and tumor necrosis factor-alpha (TNFalpha)-pr...
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Desmopressin, (DDAVP; 1-desamino-8-D-arginine vasopressin) increases the release and activity of von Willebrand factor (vWF); however, its effects on the other major constituent of endothelial Weibel-Palade bodies, P-selectin, has not been investigated. DDAVP-induced P-selectin expression may explain DDAVP's efficacy in bleeding disorders in which vWF levels are normal. Therefore, the objective...
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ژورنال
عنوان ژورنال: Blood
سال: 1991
ISSN: 0006-4971,1528-0020
DOI: 10.1182/blood.v77.7.1565.bloodjournal7771565